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T H U R S DAY 3 / 2 7 / 1 4
MOLE-PARTICLE & MOLE- VOLUME CONVERSIONS
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MOLES AND ATOMS/MOLECULES
• Avogadro’s Number (6.02x1023 particles/mol) allows us to convert between moles and atoms/molecules
• We use the unit “atoms” when we have individual atoms (H, He, C, N, etc.) and “molecules” when we have more than one atom (H2, CO2, Li2O, etc.)
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EXAMPLE: MOLE-PARTICLE
• How many atoms are in 5.59mol calcium?
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MOLES OF GAS AND VOLUME
• Avogadro said that one mole of gas at standard temperature and pressure (STP) take up 22.4L• http://
www.youtube.com/watch?v=CKs4WKv6foI&feature=relmfu
• We can easily convert between moles and liters.
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EXAMPLE: MOLE-VOLUME
• How many moles of CH4 are contained in 17.2L?
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YOUR JOB
• Complete the mixed stoichiometry worksheet
• Mini-Quiz when 10 minutes of class left! (gram-mole)